Is everyone forgetting that it wasn't Game Freak who made PBR?
Anyway, the developers sometimes don't know the best strategies with their own games. For example how the first 2 Saikyous used neutral natures- not good. The only pokémon I run with a neutral nature to great success is a cosmic power mixed Claydol that's designed to receive speed boosts off a Ninjask. So not much really, to say I have a couple of hundred EVeds.
But then again the rest of the Saikyous were pretty good. The only parts that really imply the developers don't know much about strategy are the constant stream of rock/steel would-be walls and slow start on Regigigas making him completely useless. Plus the whole Phione being banned thing is stupid- I don't get that. Latios and Latias should be banned ingame too, as they don't seem to know how strong they are.
Wow I'm in need of an updated signature.